This page contains links to hazard notices for navigation safety hazards on waterways in the Canterbury Region that have been notified to the Harbourmaster's Office.

These hazards are ones that are considered to be out of the ordinary for their location, rather than the kinds of things that any prudent vessel skipper or boatie would normally be looking out for. It should not be considered an exhaustive list of any and all hazards.

Various waterways - fences under water

11 December 2017

Fluctuating water levels on various waterways in Canterbury may result in fences or other objects being partially obscured from view.  This is occurring currently at Lake Lyndon and signage/buoys are being erected to alert water users to this hazard.  Similar situations may be present at other locations where water levels are higher than expected.  All water users are strongly recommended to exercise caution and keep speed down so that such objects can be avoided.

Hurunui River, Maori Gully - sunken jet boat

03 August 2017

On Sunday 23 July 2017 a jet boat has sank in Maori Gully, Hurunui RiverRiver.  River users are asked to keep a look out for the boat, a 14 foot (4.27m) aluminium hulled jet boat with a white deck, and email any photos of any sighting and/or a GPS location or accurate description to the Harbourmaster.  View approximate location.

Waimakariri river – sunken jet boat hull and engine

18 May 2017

At approximately 43°24, 171°.96 (Waimakariri River up from Woodstock, between Woodstock and the Viaducta) a jet boat hull and engine was sunk around 24th April 2017 and is likely to be anywhere downstream from this location. River users are asked to take care as it is not known where the debri is likely to be. If the vessel is located please advise the Harbourmasters office on 0800 324 636 as soon as possible.  Please quote reference number REC170427121510 as well as depth and GPS locations so it can be removed.

Akaroa Harbour - submerged object

10 May 2017

Reports of an object approximately 4 metres by 2 metres in size, floating 2-3 metres below the surface in the Akaroa Harbour have been received by the Harbourmasters office. This object is moving with the current, attempts to locate and remove it have been unsuccessful. All vessels are advised to take care when using the harbour.  If the object is located please advise the Harbourmasters office on 0800 324 636 as soon as possible with a depth and GPS location so it can be removed.

Motunau Fisherman's association — river warning

2 September 2016

The channel marker has been repaired and is back in position. Both lead lights are operating. Caution is advised when navigating the channel of the Motunau River due to increased amounts of sand and narrowing of the channel.The channel is forever changing course and may not be in the same place as your last visit. Please have a check at low tide before heading out to sea.

For more information please phone Helen 03 314 3751.

Waiau River - navigation safety hazards— railway irons

3 July 2015

These are upstream of Leslie Hills Bridge (seen in the second photo in the Waiau River railway irons notice (PDF 466 kB)). Environment Canterbury is presently investigating removal options for these as they may present a hazard for boats on the river. No removal date has been scheduled – please check this website for updates.

In the meantime, river users are urged to exercise caution in this area, particularly at higher flows when the irons may not be as easily seen as they are at the low flow the photos were taken at. This site (see photos in the Waiau River railway irons notice (PDF 466 kB)) can easily be seen from upstream and downstream in good time to allow boaters to avoid the objects. For further information contactharbourmaster@ecan.govt.nz

Lower Clarence River / Waiau Toa - navigation safety hazards - sputniks

30 January 2015

Sputniks are large concrete blocks with protruding steel beams that were historically used on rivers for bank protection. Many still exist on some rivers, including several in the lower Clarence / Waiau Toa, some of which are navigation safety hazards for those boating the river. For more information see the Sputniks notice (PDF 710 kB).

Brooklands Lagoon - submerged objects

30 January 2015

Submerged and semi-submerged objects including tree stumps have been reported in the Brooklands Lagoon water ski area. Users of this area are advised to exercise caution as these objects may be difficult to see, particularly if navigating at towing speed.